Transport Phenomena in Micro Heat Exchangers With Corrugated Walls

Gschwind, Peter; Gaiser, Gerd; Zimmerer, C.; Kottke, Volker

doi:10.1080/10893950152646740

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…Of particular interest is the PHE which is extensively used in the chemical, pharmaceutical and food industries, among others [1,7,8]. Laminar or low Reynolds number flows are usually obtained when liquid foods are processed in PHEs, this low Reynolds number range being also observed in micro PHEs [7,[9][10][11][12]. Besides the importance in pressure drops estimations, the development of Fanning fric-tion factor correlations, determined for the isothermal laminar flow of Newtonian fluids in PHEs, can be useful in other areas.…”

Section: Laminar Flow In Plate Heat Exchangersmentioning

confidence: 99%

Laminar flow in chevron-type plate heat exchangers: CFD analysis of tortuosity, shape factor and friction factor

Fernandes¹,

Dias²,

Nóbrega³

et al. 2007

Chemical Engineering and Processing: Process Intensification

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Laminar or low Reynolds number flows are usually obtained when liquid foods with high viscosity are processed in plate heat exchangers (PHEs). The tortuosity coefficient is a key parameter used by PHEs manufacturers to estimate Fanning friction factors and convective heat transfer coefficients. Using the finite-element computational fluid dynamics program POLYFLOW ® , fully developed laminar flows in double-sine chevrontype PHEs passages are analysed in this work. The corrugation angle and channel aspect ratio of the passages vary in a broad range, PHEs with common area enlargement factors and with high area density being studied. The tortuosity coefficient and the coefficient K (Kozeny's coefficient in granular beds) from the friction factor correlations increase with the increase of the channels aspect ratio and the decrease of the chevron angle. The shape factor from the PHEs passages also increases with the decrease of the chevron angle and is weakly influenced by the channel aspect ratio. In this paper, relations to predict the tortuosity coefficient and shape factor are proposed, the coefficient K being predicted resorting to the tortuosity coefficient and shape factor. The coefficient K compares well with literature data in the region of common chevron angles, channels aspect ratio and area enlargement factor.

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Section: Laminar Flow In Plate Heat Exchangersmentioning

confidence: 99%

Laminar flow in chevron-type plate heat exchangers: CFD analysis of tortuosity, shape factor and friction factor

Fernandes¹,

Dias²,

Nóbrega³

et al. 2007

Chemical Engineering and Processing: Process Intensification

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Experimental study of the three-dimensional flow structure in matrix channels

Philippov

Chokhar

Zolotukhin

et al. 2021

J. Phys.: Conf. Ser.

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The article presents an experimental study of the turbulent flow in matrix channels. Using the modern optical contactless laser Doppler anemometer (LDA) method, an idea of the turbulent three-dimensional flow inside the cells of matrix channels is developed. The results of the study of the matrix channel show that the so-called vortex matrix effect is not formed. The most important factor that causes a high degree of heat transfer from the walls is the intense spiral motion between the matrix cells. The measurements also show that the effects associated with the lateral boundaries of the channel play a significant role. Based on the assumption of the decisive role of the spiral flow between the cells of the matrix channel, a formula for the integral pressure loss is proposed.

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Effects of Chevron Angle on Thermal Performance of Corrugated Plate Heat Exchanger

Asadi¹,

Khoshkhoo²

2014

International Journal of Engineering Practical Research

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Transport Phenomena in Micro Heat Exchangers With Corrugated Walls

Cited by 3 publications

References 2 publications

Laminar flow in chevron-type plate heat exchangers: CFD analysis of tortuosity, shape factor and friction factor

Laminar flow in chevron-type plate heat exchangers: CFD analysis of tortuosity, shape factor and friction factor

Experimental study of the three-dimensional flow structure in matrix channels

Effects of Chevron Angle on Thermal Performance of Corrugated Plate Heat Exchanger

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